 <ul class="layui-nav layui-nav-tree" lay-filter="side-main">
	<volist name="left_menu" id="val"> 	
	    <li class="layui-nav-item">  
	        <a href="javascript:;"><i class="layui-icon">&#{$val.ico};</i>{$val.name}</a>
	        <dl class="layui-nav-child">
	        	<volist name="val['sub']" id="sval">
		            <dd><a href="javascript:;" href-url="{:U($sval['module_name'].'/'.$sval['action_name'], array('menuid'=>$sval['id']))}{$sval.data}" data-id="{$sval.id}"><i class="layui-icon">&#{$sval.ico};</i>{$sval.name}</a></dd>
	            </volist>
	        </dl>
	    </li>
	</volist>
</ul>